package com.lanbu.web.controller.common;

import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.lanbu.system.service.IUploadService;
import io.swagger.annotations.ApiOperation;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;
import com.lanbu.common.config.LanBuConfig;
import com.lanbu.common.constant.Constants;
import com.lanbu.common.core.domain.AjaxResult;
import com.lanbu.common.utils.StringUtils;
import com.lanbu.common.utils.file.FileUploadUtils;
import com.lanbu.common.utils.file.FileUtils;
import com.lanbu.framework.config.ServerConfig;

/**
 * 通用请求处理
 *
 * @author lanbu
 */
@RestController
@RequestMapping("/common")
public class CommonController
{
    private static final Logger log = LoggerFactory.getLogger(CommonController.class);

    @Autowired
    private ServerConfig serverConfig;

    private static final String FILE_DELIMETER = ",";

    public static final String VIDEO_FORMAT = "mp4avi";
    @Autowired
    private IUploadService uploadService;

    /**
     * 文件校验
     *
     * @param fileMd5 文件MD5
     * @param fileExt 文件后缀
     * @return
     */
    @ApiOperation("文件校验")
    @PostMapping("fileRegister")
    public AjaxResult fileRegister(@RequestParam("fileMd5") String fileMd5, @RequestParam("fileExt") String fileExt) throws IOException {
        if (!VIDEO_FORMAT.contains(fileExt)) {
            return AjaxResult.error("视频格式不支持！");
        }
        String fileName = uploadService.fileRegister(fileMd5, fileExt);

        if (StringUtils.isNotEmpty(fileName)) {
            String url = serverConfig.getUrl() + fileName;
            Map<String, String> result = new HashMap<>();
            result.put("url", url);
            result.put("fileName", fileName);
            result.put("newFileName", FileUtils.getName(fileName));
            result.put("originalFilename", fileName);
            return AjaxResult.success(result);
        }
        return AjaxResult.success();
    }
    /**
     *    检查分块
     * @author Mr.wangfeng
     * @date 2020/10/20 13:48
     * @param fileMd5   文件MD5
     * @param chunk     分块索引
     * @return
     */
    @ApiOperation("检查分块")
    @PostMapping("checkchunk")
    public AjaxResult checkchunk(@RequestParam("fileMd5")String fileMd5, @RequestParam("chunk")Integer chunk) {
        return AjaxResult.success(uploadService.checkchunk(fileMd5, chunk));
    }

    /**
     *    分片上传
     * @author Mr.wangfeng
     * @date 2020/10/20 13:48
     * @param file
     * @param fileMd5
     * @param chunk
     * @return
     */
    @ApiOperation("分片上传")
    @PostMapping("uploadchunk")
    public AjaxResult uploadchunk(@RequestParam("file") MultipartFile file, @RequestParam("fileMd5") String fileMd5,
                                  @RequestParam("chunk") Integer chunk) {
        return uploadService.uploadchunk(file, fileMd5, chunk);
    }

    /**
     *    组装分片
     * @date 2020/10/20 13:48
     * @param fileMd5  MD5
     * @param fileExt  后缀
     * @return
     */
    @ApiOperation("组装分片")
    @PostMapping("mergechunks")
    public AjaxResult mergechunks(@RequestParam("fileMd5") String fileMd5, @RequestParam("fileExt") String fileExt) throws Exception {
        String fileName = uploadService.mergechunks(fileMd5, fileExt);
        String url = serverConfig.getUrl() + fileName;
        AjaxResult ajax = AjaxResult.success();
        ajax.put("url", url);
        ajax.put("fileName", fileName);
        ajax.put("newFileName", FileUtils.getName(fileName));
        ajax.put("originalFilename", fileName);
        return ajax;
    }




    /**
     * 通用下载请求
     *
     * @param fileName 文件名称
     * @param delete 是否删除
     */
    @GetMapping("/download")
    public void fileDownload(String fileName, Boolean delete, HttpServletResponse response, HttpServletRequest request)
    {
        try
        {
            if (!FileUtils.checkAllowDownload(fileName))
            {
                throw new Exception(StringUtils.format("文件名称({})非法，不允许下载。 ", fileName));
            }
            String realFileName = System.currentTimeMillis() + fileName.substring(fileName.indexOf("_") + 1);
            String filePath = LanBuConfig.getDownloadPath() + fileName;

            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
            FileUtils.setAttachmentResponseHeader(response, realFileName);
            FileUtils.writeBytes(filePath, response.getOutputStream());
            if (delete)
            {
                FileUtils.deleteFile(filePath);
            }
        }
        catch (Exception e)
        {
            log.error("下载文件失败", e);
        }
    }

    /**
     * 通用上传请求（单个）
     */
    @PostMapping("/upload")
    public AjaxResult uploadFile(MultipartFile file) throws Exception
    {
        try
        {
            // 上传文件路径
            String filePath = LanBuConfig.getUploadPath();
            // 上传并返回新文件名称
            String fileName = FileUploadUtils.upload(filePath, file);
            String url = serverConfig.getUrl() + fileName;
            AjaxResult ajax = AjaxResult.success();
            ajax.put("url", url);
            ajax.put("fileName", fileName);
            ajax.put("newFileName", FileUtils.getName(fileName));
            ajax.put("originalFilename", file.getOriginalFilename());
            return ajax;
        }
        catch (Exception e)
        {
            return AjaxResult.error(e.getMessage());
        }
    }

    /**
     * 通用上传请求（多个）
     */
    @PostMapping("/uploads")
    public AjaxResult uploadFiles(List<MultipartFile> files) throws Exception
    {
        try
        {
            // 上传文件路径
            String filePath = LanBuConfig.getUploadPath();
            List<String> urls = new ArrayList<String>();
            List<String> fileNames = new ArrayList<String>();
            List<String> newFileNames = new ArrayList<String>();
            List<String> originalFilenames = new ArrayList<String>();
            for (MultipartFile file : files)
            {
                // 上传并返回新文件名称
                String fileName = FileUploadUtils.upload(filePath, file);
                String url = serverConfig.getUrl() + fileName;
                urls.add(url);
                fileNames.add(fileName);
                newFileNames.add(FileUtils.getName(fileName));
                originalFilenames.add(file.getOriginalFilename());
            }
            AjaxResult ajax = AjaxResult.success();
            ajax.put("urls", StringUtils.join(urls, FILE_DELIMETER));
            ajax.put("fileNames", StringUtils.join(fileNames, FILE_DELIMETER));
            ajax.put("newFileNames", StringUtils.join(newFileNames, FILE_DELIMETER));
            ajax.put("originalFilenames", StringUtils.join(originalFilenames, FILE_DELIMETER));
            return ajax;
        }
        catch (Exception e)
        {
            return AjaxResult.error(e.getMessage());
        }
    }

    /**
     * 本地资源通用下载
     */
    @GetMapping("/download/resource")
    public void resourceDownload(String resource, HttpServletRequest request, HttpServletResponse response)
            throws Exception
    {
        try
        {
            if (!FileUtils.checkAllowDownload(resource))
            {
                throw new Exception(StringUtils.format("资源文件({})非法，不允许下载。 ", resource));
            }
            // 本地资源路径
            String localPath = LanBuConfig.getProfile();
            // 数据库资源地址
            String downloadPath = localPath + StringUtils.substringAfter(resource, Constants.RESOURCE_PREFIX);
            // 下载名称
            String downloadName = StringUtils.substringAfterLast(downloadPath, "/");
            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
            FileUtils.setAttachmentResponseHeader(response, downloadName);
            FileUtils.writeBytes(downloadPath, response.getOutputStream());
        }
        catch (Exception e)
        {
            log.error("下载文件失败", e);
        }
    }
}
